@article {IOPORT.06020579,
    author       = {Iljazovi\'c, Zvonko},
    title        = {Co-c.e. spheres and cells in computable metric spaces.},
    year         = {2011},
    journal      = {Logical Methods in Computer Science [electronic only]},
    volume       = {7},
    number       = {3},
    issn         = {1860-5974},
    pages        = {Paper No. 5, 21 p., electronic only},
    publisher    = {Logical Methods in Computer Science c/o Institute of Theoretical Computer Science, Technical University of Braunschweig, Braunschweig},
    doi          = {10.2168/LMCS-7(3:5)2011},
    abstract     = {Summary: We investigate conditions under which a co-computably enumerable set in a computable metric space is computable. Using higher-dimensional chains and spherical chains we prove that in each computable metric space which is locally computable each co-computably enumerable sphere is computable and each co-c.e. cell with co-c.e. boundary sphere is computable.},
    identifier   = {06020579},
}